Alex Hyde / Common Lizard (Zootoca vivipara) basking on lichen-covered tree stump. Peak District National Park, Derbyshire, UK. August.

Wendy Shattil / Light shining through the U.S. border wall, Organ Pipe Cactus National Monument, Arizona, USA, March 2020.

Guy Edwardes / Barn amongst network of meadows and drystone walls, on summer morning. Wensleydale, Yorkshire Dales National Park, North Yorkshire, England, UK. May.

Guy Edwardes / Waves crashing against sea wall and Porthcawl Lighthouse during Storm Ciara, people storm watching surrounded by waves. Mid Glamorgan, Wales, UK. February 2020.

Edwin Giesbers / RF - Sand lizard (Lacerta agilis) the Netherlands. (This image may be licensed either as rights managed or royalty free.)

Franco Banfi / Octopus, (Octopus vulgaris), splashing a cloud of ink and swim away with Bearded fireworm, (Hermodice carunculata) who want to eat a small octopus, top of the wall of Bisevo, Vis Island, Croatia, Adri...

Andres M. Dominguez / Ocellated or jewelled lizards (Timon lepidus) basking on rocks, Los Alcornocales Natural Park. Southern Spain. May.

Fabio Pupin / Gallot's lizard, (Gallotia galloti), male in habitat, Tenerife, Canary Islands, Spain, April . Non-ex.

Fabio Pupin / Moorish gecko, (Tarentola mauritanica), hunting on window, Italy, April . Non-ex.

Jo-Anne McArthur / We Animals / Rattlesnake skins pinned to a wall, with bloody handprints and signatures of those who have skinned snakes at at the annual Rattlesnake Roundup, Sweetwater, Texas, USA. Highly commended in the Wildlif...

Jack Dykinga / Mexican / United States border in Arizona, where the newer taller sections of the border wall pushed by President Trump are being erected in the environmentally sensitive Organ Pipe National Monument....

Jack Dykinga / Mexican / United States border in Arizona, where the newer taller sections of the border wall pushed by President Trump are being erected in the environmentally sensitive Organ Pipe National Monument....

Jack Dykinga / Saguaro cacti (Carnegia gigantea) at sunset, during a summer rain storm. Saguaro National Park, Sonoran Desert, Arizona, USA, August. Digital composite.

Jack Dykinga / Landscape at the older Mexican / United States border wall in Arizona. Newer taller sections of the border wall pushed by President Trump are being erected in this environmentally sensitive Organ Pipe...

Jack Dykinga / Border wall with razor wire at the Mexican / United States border in Arizona, where the newer taller sections of the border wall pushed by President Trump are being erected in the environmentally sens...

Jack Dykinga / Bird caught in border wall mesh at the Mexican / United States border, Organ Pipe National Monument, Arizona, USA, August.

Jack Dykinga / Mexican / United States border in Arizona, where the newer taller sections of the border wall pushed by President Trump are being erected in the environmentally sensitive Organ Pipe National Monument....

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) walking on mud dam wall. Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) (T27) walking on bund / dam wall trail. Kanha National Park, Central India. Camera trap image.

Theo Bosboom / Crashing waves at large basalt wall, Arnarstapi, Snaefellsnes, Iceland. May 2013

Matthew Maran / Red Fox (Vulpes Vulpes) on garden wall, North London, England UK

Paul Hobson / Badger (Meles meles) emerging through gateway in wall at night. In urban area, Sheffield, England, UK. October 2018.

Nick Upton / Female House spider (Tegenaria sp.) at the mouth of her tubular silk retreat in an old stone wall, Somerset, UK, September.

Nick Upton / Running foliage spider / Spiny-legged sac spider (Liocranum rupicola), a nationally scarce species in the UK, hunting at night in an old stone wall, Wiltshire, UK, September.

Nick Upton / Common lace weaver / Lace-webbed spider (Amaurobius similis) male in its web in an old stone wall at night, Wiltshire, UK, September.

TJ Rich / Four chocolate working cocker spaniels on wall. Mother and offspring. Monmouth, Monmouthshire, Wales

Guy Edwardes / Aurora Borealis over Sycamore Gap, Hadrian's Wall, Northumberland, England. February 2014

Guy Edwardes / Dry-stone walls and barns in Wensleydale, Yorkshire Dales National Park, North Yorkshire, England, UK, June 2016.

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei) silverback sitting on boundary wall between Volcanoes National Park and a Potato crop, looking into valley. Area to be restored to forest. Rwanda.

Jordi Chias / Goliath grouper (Epinephelus itajara) inside a coral cave. Bloody Bay Wall, Little Cayman, Cayman Islands. British West Indies. Caribbean Sea.

Jack Dykinga / Narrows with canyon wall reflections in mud patterned shore, Vermilion Cliffs National Monument, Paria Canyon Wilderness, Arizona, USA.

Matthew Maran / Urban Red fox (Vulpes vulpes) walking past wall with red fox mural / graffiti . North London, England, UK, April.

Klein & Hubert / Ibex (Capra ibex) female with kid on rock wall, Alps, Switzerland.

Jack Dykinga / Douglas firs (Pseudotsuga menziesii) in 'Wall Street' Canyon. Bryce Canyon National Park, Utah, USA, October.

Yashpal Rathore / Demoiselle cranes (Anthropoides virgo) silhouetted at dusk on a wall during their winter migration.Khichan, Western Rajasthan, India. February.

Alex Mustard / Spotlight goby (Gobiosoma louisae) looking out from inside a Yellow tube sponge (Aplysina fistularis), growing on a coral reef. Bloody Bay Wall, Little Cayman, Cayman Islands, British West Indies. Car...

Laurie Campbell / Common / Viviparous lizard (Zootoca vivipara) mother with young. Burnmouth, Berwickshire, England, UK.

Brent Stephenson / Sunset off Scott Island, with floating pieces of sea ice, Scott Inlet, Baffin Island, Canadian Arctic, August 2015.

Alex Mustard / Hairy pipehorse (Acentronura dendritica) female swimming over the seabed with her prehensile tail in the air. Bloody Bay Wall, Little Cayman, Cayman Islands. Caribbean Sea.

Alex Mustard / Hawksbill turtle (Eretmochelys imbricata) on a reef wall with a rope sponge. East End, Grand Cayman, Cayman Islands. Caribbean Sea.

Alex Mustard / Hawksbill turtle (Eretmochelys imbricata) cruising along the drop off of a coral reef. Bloody Bay Wall, Little Cayman, Cayman Islands. Caribbean Sea. NB. Turtle has two identification tags in its fron...

Juan Carlos Munoz / Lavender (Lavendula angustifolia) fields in front of Senanque Abbey, Gordes Village, Provence, France, July 2015.